The following report is provided by the Amateur Radio on the International Space Station (ARISS)
Due to the recent failure of the VHF ham radio in the International Space Station Columbus module, the APRS packet system that operates at 145.825 MHz is not available.
To mediate this situation, the crew has activated the ARISS UHF radio that had been in storage on the space station and packet is now operational on the UHF ham band on 437.550 MHz. This radio was installed by licensed Amateur and crew member Shane Kimbrough, KE5HOD .
The packet operation is using the same protocol as with the previous VHF radio. Only the frequency band for operation has changed.
Amateur operators using the system should adjust for the increased Doppler shift experienced when operating in the UHF ham band.
The ARISS team is currently working on Kenwood D710GA models to replace and unify all Amateur radios on board the ISS. Target date for delivery is late 2017.